Playing the current Age of Engineering Modpack but have also run into this issue on FTB-Beyond.
My bees are just not producing their specialty regardless of the correct temperature / humidity.
And i tried setting it up in the correct biome, simulating the correct t/h in an alveary and even tried it with a biome changer in an industrial apiary on ftb beyond.
I am at a loss here.


I have let this setup run for around 30 generations and have not gotten 1 emerald fragment.
Same issue with the apocalyptic bee and i suppose the withering bee will be no different.

You need to place a specific block under the apiary.

An emerald block for the emerald queen.
A diamond block for the diamond queen.
A tnt block for the apocalyptic queen.

There is a wiki where it shows the required block.

fk me, that was it.
Also found the wiki, after i knew what i had to look for:
https://github.com/Lach01298/MoreBees/wiki/Bee-Species#wither-1

Thank you sir, this is a huge relief.